Improvement in mechanical movement



n n-WIN O. ROOD., OF LODLILLINOINS.

Letter@ Patent No. 81,819, dated September 1, 1868.

IMPROVEMENT IN MECHANICAL MOVEMENT.

tite .stimule referat tu im' ttm tetten prima mit :rating tra uf its same.

To 'ALL wHoM-I'r MAY OONOERN:

Beit known that I, EDWIN O. ROOD, of Lodi, in `the county of Kane, and'State of Illinois, have'invented a new and useful Mechanical Movement; and I do hereby declare thc following to be a full, clear, and'exact description4 of the same, reference being .had to the accompanying drawings, which are vmade a part oi' this specification.' l Y p The subject of this invention is a novel mechanical movement for transmitting motion to machinery generally. The deviceconsists of a lever, xed in a peculiar manner to a rock-shaft, and vibrated by the alternate action of projections upon two wheels or circular rims, between which the lever and rock-shaftare situated.

In the drawings-- Figure lIl` is a perspective view, .and

Figure 2 aplan, illustrating the application of my invention to a reaping-machine.

Figure 3 is a sectional front elevation.

vSimilar letters of reference indicate corresponding parts in the two gures.

While the invention may be applied very advantageously .to mowing and reaping-machines,- it is only illustratcd in connection with that kind of" implement-for the sake of convenience, it being designed for application to various kinds of machinery, which it is unnecessary to enumerate.

In order that others skilled in the art to which my invention appcrtains may be enabled to fully understand and use the same, I will proceed to describe it in connection with the accompanying drawings:

A. A may represent the ground or carrying-wheels of amowing-machine, whose axle-tree is mounted in' j the frame B,'to which the draught-tongue C and cutting-apparatus D are attached at the front and rear respectfront andrear end of the frame B.

ively. E E are wheels or rings, of somewhat smaller diameter than the wheels A A, the same being ixed to the wheels A eoncentribally, so as to turn therewith. x, i

Each of the rings E `is provided with a circular 'serie's of teeth or projections, e e e. The projections of one ring are at points midway between the projections of the other ring, so that a line carried forth and back from the projections of one wheel to those of the other wheel would present a zigzag appearance.

F is a roekshaft, situated betwebn the wheels and toothed rings, as shown, and having its bearings in the G isa vibrating arm, attached to the rear end of` the rock-shaft F,l and connected, by a wrist-pin, g, with .the pitman y', which imparts motion to the cutter-bar Vof the cutting-apparatus.

H is a vibrating lever, made fast to the rock-shaft F, in the manner shown in tig. 3. When this lever H is in'a horizontal position, its extremities are equally near their respectively-adjacent rings E E, and -in the paths in which both series of teeth e revolve, anda straight line drawn from one extremity of H to its opposite extremity would pass below the centre otthe rookshaiit F. This latter feature is to be particularly noted, inasmuch as it is absolutely essential to lthe operation of the device. i

The longitudinal Acentre of the lever H (when horizontal) being below the`centre of the roek-shaft F,as described, adapts the teeth e, ofthe respective rings E E, to alternately act upon the ends-of said lever, keepingV it in continual vibration, and thereby giving motion to the rock-shaft, and through it to the parts of the machinery.

rIn order to elucidate the operation of the lever H, it may be necessary .to-imagine a vertical plane passing through the centre of the rock-shaft longitudinally. V

Now, if therlevcr H were so applied to the shaft Fthat its longitudinal centre, when horizontal, is neither above nor below the centre of the shaft F, it is manifest that the vibration of said lever H .would not vary the relative distance of its extremities from the vertical plane, above-referred pto, the distance between said plane and the extremities of the lever being, in that case, always the saine; hence, a lever so applied would not opersite, as one vibrationwould suiiice to carry both ends beyond the reach of the projections e' on the rings E.

Under my method of applying the lever to the shaft F, each vibration of said lever places its upper extremity farther away from the above-referied-to imaginary vertical plane than the lower end, and hcnce,vwhile the upper Jend of tho lever stands in the path of one series of projections'e, to be depressed thereby, tbeother end is suflciently removed from the other series of projections to avoid oounterocting contactA therewith, the ascending' extremity of the lever escaping the action of one series of projections till the other extremity is out of the reach of the other seiics. When the machine is booked or reversed, both ends of the lever H remain beyond the field of motion of the teeth e, and hence the operation of soid lever ceases.

I do not limit myself` to the mode hex-ein described of communicating'motion to the lever H, as the latter l may, by an obvious mechanical modification, be made to act upon the rings, instead of the rings upon it. So long as the two circulo.;` series of teeth or projections e are' employed, it is immaterial Whether the seme be upon a Wheel, ring, or disk, or otherwise situated.

Having thus described my invention, what I claim as new herein, andidesire to secure by,LettersiPa.tent, is-

The vibrating lever or bar H, or its equivalent, applied to o rock-shaft, F, in the manner desoribed, and employed in conjunctionwith two circular vseries of teeth or projections e, suhstantiallya's and for the purpose set forth.

To the above, I have signed my name, this 17th day of Angust,1868. i

' EDWIN O. ROOD,

Witnesses:

JOHN A. Wmnnnsnnm, Cms. D. SMITH., 

